@font-face {
    src: format(woff);
}

@font-face {
    src: url(a) format(woff), url(b) format(svg);
}

@font-face {
    src: format(woff), format(truetype), format(opentype), format(woff2), format(embedded-opentype), format(collection), format(svg);
}

@Font-face {
    src: FORMAT(WOFF)
}

@font-face {
    src: format("woff");
}

@font-face {
    src: url(a) format("woff"), url(b) format(svg);
}

@font-face {
    src: url(a) format("woff"), url(b) format("svg");
}